T5 retro, with Tek II reflectors,... how many

[4ptbuck]

Anybody know how many T5's with the TEK II reflectors I can put in an 8" space?

I am re-doing the canopy of my 150g long, and have 16" of canopy for lights, split into 2 8" sections. ie a flip open/over hood.

I was thinking about putting 8 in there, but I think the Tek II reflectors measures 2.75", which will make 3 a tight fit.